专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

US5107495A Frame synchronization system 失效
标题翻译：帧同步系统
公开(公告)号：US5107495A
公开(公告)日：1992-04-21
申请号：US540633
申请日：1990-06-20
申请人： Nobuhisa Kamoi , Yuji Takahashi , Koji Ikuta
发明人： Nobuhisa Kamoi , Yuji Takahashi , Koji Ikuta
IPC分类号： H04J3/06 , H04L7/08
CPC分类号： H04J3/0608
摘要： A frame synchronization system includes a synchronization detector supplied with a digital signal including frame synchronizing pulses for outputting the digital signal in a frame synchronization state, an adding part for adding a forward guard identification code to the digital signal output from the synchronization detector when a forward guard information is received from the synchronization detector, a first memory for storing the digital signal including the forward guard identification code output from the adding part, a detector for monitoring the digital signal read out from the first memory and for outputting forward guard detection information when the digital signal read out from the first memory includes the forward guard identification code, a second memory for storing the digital signal read out from the first memory in response to a control signal, where the digital signal read out from the second memory is output as an output signal of the frame synchronization system, and a controller for producing the control signal which controls write and read operations of the first and second memories in response to synchronization error information and the forward guard detection information. The synchronization error information is output when a synchronization error of the digital signal is detected and the forward guard information is output from a time when an abnormality of the frame synchronizing pulses is detected to a time when the synchronization error is detected. The control signal prohibits the digital signal read out from the first memory from being stored in the second memory when the controller receives at least one of the synchronization error information and the forward guard detection information.
摘要翻译：帧同步系统包括一个同步检测器，该同步检测器被提供有一个数字信号，该数字信号包括用于以帧同步状态输出数字信号的帧同步脉冲;一个加法部分，用于将前向保护识别码加到从同步检测器输出的数字信号中，从同步检测器接收到保护信息，第一存储器，用于存储包括从加法部分输出的前向保护识别码的数字信号，用于监视从第一存储器读出的数字信号的检测器，以及当从第一存储器读出的数字信号时，从第一存储器读出的数字信号包括前保护识别码，第二存储器，用于响应于控制信号存储从第一存储器读出的数字信号，其中从第二存储器读出的数字信号作为帧同步系统的输出信号，以及控制器，用于响应于同步错误信息和前向保护检测信息产生控制第一和第二存储器的写入和读取操作的控制信号。当检测到数字信号的同步错误并且从检测到帧同步脉冲的异常到检测到同步错误的时刻输出正向保护信息时，输出同步错误信息。当控制器接收到同步错误信息和前向保护检测信息中的至少一个时，控制信号禁止从第一存储器读出的数字信号被存储在第二存储器中。

IPRDB

热门服务

关于我们

友情链接

联系方式